Although I failed to capture them on the camera, there was two flexible PCB antennas in a vertical configuration. One antenna was marked 'Zigbee'. Now this has my interest piqued. I assumed there was two antennas for better reception but perhaps one antenna is Wifi and one antenna is for something else? Zigbee? No way. Really? Could Nest be planning on adding other equipment control such as lighting or refridgeration? After using the Nest and its accompanying website, I certainly hope so.